Hey all. My 2000 Cherokee has an oil pressure issue. I start it, and the gauge read 40-ish psi. I can drive it for about 15- 20 minutes, and the gauge will drop to 20- ish psi. When I touch the accellerator again, it goes back up and will remain there until I let off. I replaced the sending unit, but that didnt solve the problem.

So, what's the safe operating range for this engine's oil pressure? Is this normal, or how can I fix it?

It is a very common problem with jeeps. The oil pressure sending unit, which is located just above the oil filter and has a wire harness with 1 wire attached to it, go bad. You need a special socket that they sell at most car parts stores to remove it (I got mine at Autozone for 6 bucks). Since you have the oil pressure gauge, the part is 28-40 dollars im pretty sure.
Just swap out sending units and you will get the correct reading for your car, which is usually right in the middle (im so technical, I know).
Good Luck

The oil pressure is normal. Minimum pressure (at idle) is 13psi and maximum pressure (under acceleration) is 75psi. As long as it stays in that range it's happy. You could install a mechanical sensor to replace the one on the dash, but it will give you similar readings.

As far as the O2 sensor, how many miles are on the Jeep? It could be as simple as replacing it._________________97 XJ Sport with a bunch of stuff

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